Mouth guard



FIG. 1 is a front elevational view of a mouth guard, shown in a usedcondition with a person shown in broken lines showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a bottom perspective view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a right-side elevational view thereof, the left-sideelevational view being a mirror image thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines showing a person in FIG. 1 depict environmental matterand form no part of the claimed design.

CLAIM The ornamental design for a mouth guard, as shown and described.